Suicide is the most efficient way to solve all your problems. But I don't agree with people who commit suicide by jumping off a building or hanging themselves, I think they should do it in a painless way so they can feel peace in the last moments of their lives.
Wasn't there some kind of pod in another country that just has you breathe a gas as you drift off to sleep and the company comes and gets the pod and your remains later?
Yes, in Switzerland, they primarily use nitrogen suffocation. This is good because the way your body detects a lack of oxygen is a build up of CO2, while nitrogen is already 70% of the air so it's ignored. So you don't feel like you're suffocating, you just run out of oxygen and go hypoxic.
The exact gas they use might not be pure nitrogen, but I think that's primarily what it is.
Nitrogen suffocation is the way to go. The body can't detect oxygen because it's using it, so we detect carbon dioxide to determine if we're running out of oxygen but we completely ignore nitrogen (which makes up like 70% of the air). Thus, if you suffocate on nitrogen you don't notice any carbon dioxide build up to trigger the suffocation response, you just start to feel the affects of a lack of oxygen and die in blissful hypoxia.
I'm pretty sure this is what they do in the little pods in Switzerland. We should also do this for livestock, in my opinion, as killing pigs with carbon dioxide is inhumane (they respond the same as people). However, the fact that nitrogen kills people so easily and sneakily makes it much more dangerous - nitrogen can expel all the oxygen out of the room, and people won't notice, so you need expensive equipment and measuress to prevent and detect leaks. Meanwhile, CO2 is heavier than air, so you can just have open pits of CO2 and lower pigs into them, and all you need to protect people with is a railing. However I think the meat would be better if the animal wasn't in agony as it died.
Fun fact: jumping is the single lest effective method of suicide. You are very likely to fuck yourself but not die, instead having to spend weeks in the hospital and possibly be disabled for life.